I've been blown away by being able to finally, at long last, game on my linux machine. Between emulators and Steam's Proton, I'm rarely if every needing to boot into W$ just for games. That said,while I can play the gamepass web streaming thing, I don't know if there is a way to use gamepass locally with Proton. Is that possible?
You could go down the GPU Passthrough option to a VM. If you have integrated and and another GPU you could use LookingGlass and never even have to leave the Linux instance. Single passthrough is what i use to run Gamepass as you do get some good games Day one.